Well, we obey Christ by simply believing his Word. That is the only work we are to, anything else would be iniquity. Since we died on the cross with Jesus, it is no longer "I" that liveth, but Christ liveth in me. The big "I" is the problem, this man is supposed to be taken off, and we are to put on the new man which is not "I", but Christ. We can if we want to struggle and take control back from Christ, and let the "I" rule once again if we want. There is no way the "I" can be obedient to God, and that was the reason he came
to did for man what he could not do, and that was to be obedient. This is what trips up most believers today, they think it is "I" that is to be doing the works of God. We have already tried that method, and it does not work. This is why scripture tells us, "I can do all things through Christ who strengthens me" Did you notice who is the one doing the work? It is Christ! We have this treasure in earthen vessels so that the excentancy of the power may be of God and not of ourselves.
Rom 8:3 For God has done what the law, weakened by the flesh, could not do. By sending his own Son in the likeness of sinful flesh and for sin, he condemned sin in the flesh,
Rom 8:4 in order that the righteous requirement of the law might be fulfilled in us, who walk not according to the flesh but according to the Spirit.